Fort Collins 7-day weather forecast

Written by:
March 23, 2026
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Fort Collins 7-day weather forecast

Stacker created the forecast for Fort Collins, Colorado using data from OpenWeather. This week's high is 81 °F on Sunday, while the low is 31 °F on Tuesday. There are expected to be 4 sunny days and rain on 6 days this week.

NWS Denver CO has issued a freeze watch until Tuesday at 08:00 AM.

Monday, May 18

- High of 49 °F, low of 34 °F (96% humidity)
- Overcast with a 100% chance of rain (18 mm of rain)
- Very high risk of harm from sun exposure (9 UV index)
- Gentle breeze (12 mph wind)
- Sunrise at 5:40 AM, sunset at 8:12 PM
1 / 6
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Tuesday, May 19

- High of 55 °F, low of 31 °F (49% humidity)
- Fair with a 100% chance of rain (5 mm of rain)
- Very high risk of harm from sun exposure (11 UV index)
- Gentle breeze (10 mph wind)
- Sunrise at 5:40 AM, sunset at 8:13 PM
2 / 6
Dmitry Naumov // Shutterstock

Wednesday, May 20

- High of 64 °F, low of 44 °F (54% humidity)
- Mostly cloudy with a 90% chance of rain (2 mm of rain)
- Very high risk of harm from sun exposure (8 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:39 AM, sunset at 8:14 PM
3 / 6
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Thursday, May 21

- High of 70 °F, low of 45 °F (49% humidity)
- Mostly sunny with a 100% chance of rain (1 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (8 mph wind)
- Sunrise at 5:38 AM, sunset at 8:15 PM
4 / 6
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Friday, May 22

- High of 66 °F, low of 47 °F (36% humidity)
- Partly sunny with a 100% chance of rain (10 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Moderate breeze (17 mph wind)
- Sunrise at 5:37 AM, sunset at 8:16 PM
5 / 6
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Saturday, May 23

- High of 77 °F, low of 46 °F (29% humidity)
- Sunny with a 0% chance of rain
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:37 AM, sunset at 8:17 PM
- First quarter moon
6 / 6
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Sunday, May 24

- High of 81 °F, low of 56 °F (18% humidity)
- Mostly sunny with a 62% chance of rain (0 mm of rain)
- High risk of harm from sun exposure (6 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 5:36 AM, sunset at 8:18 PM

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